Probably larger than the A380, felled by hydrogen and capable of Mach6-8 the EU are to fund 'a second phase of European Space Agency led studies into a hypersonic civil transport capable of flying from Brussels to Sydney in as little as two hours.' click here No meals on this aircraft then except for maybe a quick sandwich! :o)
Clicking the hyperlinks gives more info on possible shapes and ram-jet engines. Me, I'm hyper-ventilating already! :o) TC.
wondering if the average human could comfortably withstand the stresses of a 2 hour flight to sydney. Turns out that if you assume a best case scenario for the least acceleration, which is constant halfway there then the same again deceleration for the rest it comes out to about 1/3G, which surprised me. Thats not to say that its a practical proposition, however, as there might only be room for 2 people between all the fuel tanks it might need.
I wish someone would ask the right questions before EU spends money on this. I suggest a couple...
(i) International agreement has been reached that aircraft fuel spec is limited by flashpoint as far as possible to reduce fire risk in accidents. Are you ignoring this safety measure?
(ii) Hydrogen in quantity would have to be carried at low temperature as a liquid. Usually at fuel top-ups in service the weight will increase for the same fuel load because the concentration of deuterium in unused fuel will have increased by fractional distillation. How are you countering this?
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